Where probate is granted to one or some of two or more persons named as executors, whether or not power is reserved to the others or other to prove, all the powers which are by law conferred on the personal representative may be exercised by the proving executor or executors for the time being and shall be as effectual as if all the persons named as executors had concurred therein.

This section applies whether the testator died before or after the commencement of this Act.